private function selectCoordinators() {
        $primary_coordinator_group = $this->oSByteFog->selectPrimaryCoordinatorGroup($this->ip);
        $coordinator_groups_ids = $this->oSByteFog->selectOverflowCoordinatorGroups($primary_coordinator_group);
        $coordinators = $this->oSByteFog->getCoordinatorsByGroupsIds($coordinator_groups_ids);
        return $coordinators;
    }